211012021697 has 2 divisors, whose sum is σ = 211012021698. Its totient is φ = 211012021696.

The previous prime is 211012021691. The next prime is 211012021711. The reversal of 211012021697 is 796120210112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203401902001 + 7610119696 = 451001^2 + 87236^2 .

It is a cyclic number.

It is not a de Polignac number, because 211012021697 - 2¹⁶ = 211011956161 is a prime.

It is not a weakly prime, because it can be changed into another prime (211012021691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506010848 + 105506010849.

It is an arithmetic number, because the mean of its divisors is an integer number (105506010849).

Almost surely, 2^211012021697 is an apocalyptic number.

It is an amenable number.

211012021697 is a deficient number, since it is larger than the sum of its proper divisors (1).

211012021697 is an equidigital number, since it uses as much as digits as its factorization.

211012021697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The spelling of 211012021697 in words is "two hundred eleven billion, twelve million, twenty-one thousand, six hundred ninety-seven".